Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 20,322	$ 19,920	$ 16,330
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	3,335	2,916	2,832
Allocation of ESOP stock	603	570	538
Stock awards	1,300	928	671
Amortization of core deposit intangible	21
Amortization of servicing asset	245	1,016	1,385
Net premium amortization in excess of discount accretion on securities	1,991	2,816	3,667
Net premium amortization of deferred fees and discounts on loans	55	63	501
Provision for loan losses	1,275	2,630	2,800
Provision for repurchased loans and loss sharing obligations			975
Deferred tax provision (benefit)	1,441	82	(1,750)
Net (gain) loss on sales of other real estate owned	(269)	(46)	105
Net gain on sales of loans	(822)	(772)	(2,138)
Net gain on sales of investment securities available for sale		(1,031)	(46)
Proceeds from sale of mortgage servicing rights	192	3,155
Net gain on sale of loan servicing	(111)	(408)
Proceeds from sales of mortgage loans held-for-sale	49,436	39,641	106,719
Mortgage loans originated for sale	(47,110)	(42,571)	(99,614)
Increase in value of Bank Owned Life Insurance	(1,501)	(1,477)	(1,404)
Decrease (increase) in interest and dividends receivable	68	(126)	596
Decrease in other assets	1,670	151	2,031
(Decrease) increase in other liabilities	(3,690)	124	1,260
Total adjustments	8,129	7,661	19,128
Net cash provided by operating activities	28,451	27,581	35,458
Cash flows from investing activities:
Net increase in loans receivable	(146,646)	(152,852)	(24,917)
Purchase of loans receivable	(22,054)	(20,574)
Proceeds from sale of non-performing loans		19,058
Proceeds from sales of investment securities available-for-sale		8,439	1,244
Purchase of investment securities available-for-sale	(9,972)	(20,547)	(28,292)
Purchase of investment securities held-to-maturity	(16,349)	(5,003)	(847)
Purchase of mortgage-backed securities available-for-sale			(127,582)
Purchase of mortgage-backed securities held-to-maturity	(10,312)	(35,203)
Proceeds from maturities of investment securities available-for-sale		35,005	45,395
Proceeds from maturities of investment securities held-to-maturity	46,292	7,711	3,725
Principal repayments on mortgage-backed securities available-for-sale			75,460
Principal repayments on mortgage-backed securities held-to-maturity	61,081	57,199	24,017
(Increase) decrease in Federal Home Loan Bank of New York stock	(494)	(4,652)	2,543
Net proceeds from sale and acquisition of other real estate owned	3,342	4,016	2,116
Purchases of premises and equipment	(3,891)	(3,970)	(4,283)
Cash received, net of cash consideration paid for acquisition	3,703
Net cash (used in) provided by investing activities	(95,300)	(111,373)	(31,421)
Cash flows from financing activities:
Increase (decrease) in deposits	73,197	(26,628)	27,092
(Decrease) increase in short-term borrowings	(27,740)	24,746	112,513
Proceeds from Federal Home Loan Bank advances	55,000	215,000	70,000
Repayments of Federal Home Loan Bank advances	(6,853)	(110,000)	(225,000)
Repayments of other borrowings	(5,000)
Increase (decrease) in advances by borrowers for taxes and insurance	798	(148)	(915)
Exercise of stock options	396	349	65
Purchase of treasury stock	(6,459)	(9,178)	(8,108)
Dividends paid	(8,693)	(8,241)	(8,239)
Tax benefit (expense) of stock plans	32	51	(31)
Net cash provided by (used in) financing activities	74,678	85,951	(32,623)
Net increase (decrease) in cash and due from banks	7,829	2,159	(28,586)
Cash and due from banks at beginning of year	36,117	33,958	62,544
Cash and due from banks at end of year	43,946	36,117	33,958
Supplemental disclosure of cash flow information:
Interest	8,928	7,243	9,969
Income taxes	10,562	11,801	8,136
Non-cash investing activities:
Reclassification of securities available-for-sale to held-to-maturity			536,010
Accretion of unrealized loss on securities reclassified to held-to-maturity	1,375	1,218	206
Loans charged-off, net	870	7,243	2,380
Transfer of loans receivable to other real estate owned	6,979	$ 4,289	$ 3,356
Non-cash assets acquired:
Securities	6,758
Federal Home Loan Bank of New York stock	314
Loans	121,466
Other real estate owned	257
Deferred tax asset	3,227
Other assets	8,279
Goodwill and other intangible assets, net	2,099
Total non-cash assets acquired	142,400
Liabilities assumed:
Deposits	123,346
Federal Home Loan Bank advances	6,800
Other liabilities	309
Total liabilities assumed	130,455
Total consideration for acquisition	$ 11,945